Motor driving circuit, integrated circuit device, electronic apparatus, and motor control method
AssigneeSeiko Epson Corporation
InventorsMotoaki Nishimura, Haruo Hayashi, Makoto Katase, Yusuke Sano
Life of this patent
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Abstract
A motor driving circuit includes a stepping motor driving circuit that controls driving of a stepping motor, a DC motor driving circuit that controls driving of a DC motor, and a control circuit that controls the stepping motor driving circuit and the DC motor driving circuit. The control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit.
Claims8
An electronic apparatus comprising:
- a motor driving circuit;
- a stepping motor;
- and
- a DC motor,
- wherein the motor driving circuit comprises:
- a stepping motor driving circuit configured to control driving of the stepping motor;
- a DC motor driving circuit configured to control driving of the DC motor;
- and
- a control circuit configured to control the stepping motor driving circuit and the DC motor driving circuit,
- wherein the control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit,
- wherein the stepping motor and the DC motor are both electrically connected to the motor driving circuit.
A motor control method comprising:
- when a driving instruction for driving a stepping motor has been accepted in the middle of performing driving of a DC motor,
- stopping driving of the DC motor;
- and
- starting driving of the stepping motor,
- wherein the stepping motor and the DC motor are both electrically connected to the motor driving circuit.
An electronic apparatus comprising:
- a motor driving circuit;
- a stepping motor;
- and
- a DC motor,
- wherein the motor driving circuit comprises:
- a stepping motor driving circuit configured to control driving of the stepping motor;
- a DC motor driving circuit configured to control driving of the DC motor;
- a constant current generation circuit configured to supply a constant current to a load;
- and
- a control circuit configured to control the stepping motor driving circuit, the DC motor driving circuit, and the constant current generation circuit,
- wherein the control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the constant current generation circuit performing supply of the constant current to the load, stops supply of the constant current to the load by the constant current generation circuit, and starts driving of the stepping motor by the stepping motor driving circuit,
- wherein the stepping motor and the DC motor are both electrically connected to the motor driving circuit.
Dependencies are inferred from the claim text.